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www.sparkfun.com]
Interesting idea (Maybe it's been talked about/done before here) but this seems like a pretty straight forward, almost "plug and play" to use your phone's capabilities. I'm no programmer, but it looks like something that could definitely be integrated into the reprap project
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blog.burningriverlabs.com <-blog
www.burningriverlabs.com <- work
www.clevelandracing.com <-fun